LoL.. OS issue!!! :rofl:
Someone clearly hasn't been following this thread, because if you had read my previous posts here you would know that this isn't an OS problem!!!
This is just a bug with CPU-Z obviously, and also the Vista Basic Information screen displays 6GB, for some reason, these apps know that I have 3 x 2GB modules installed on my mobo, but if I check the BIOS, POST screen, and the Performance tab in Task Manager these all tell me that there is only 4GB being detected... however, the very latest version of CPU-Z (1.52) it only sees 4GB.. check this screenie to see the latest CPU-Z reporting 4GB, also notice how the new version also lowers the CPU frequency when speedstep starts working.. 1.51 didn't seem to lower the clock frequency like this...
http://img33.imageshack.us/img33/7078/cpuz152.jpg
Also, the F7 BIOS for the UD5 picks up the RAM timings as well, but the Standard CMOS Features screen only says that there is 4GB usable...
When I flashed the BIOS to F8d and F8f, both of these BIOS'es wouldn't show the timings for the stick of RAM in the first white slot, it said N/A beside each setting...
My problem is definitely hardware related, the amount of time and money I have spent problem solving this rig to try and trace the route of this issue is insane!!!
I am 110% positive the IMC on my processor is shot.. I sent an e-mail to Intel support team, and explained everything that I have done in regards to testing my hardware with multiple mobos, sets of RAM, graphics cards, PSU's, HDD's etc etc, and how the only piece of hardware that hasn't changed throughout all of my testing was the CPU, they also agreed that the problems lie within the CPU...
I have an RMA number for the processor, but I was going to hold off sending it back until I got my Fiancee's i920 to complete her new PC, but after getting the reply back from Intel, I am just going to ship the CPU off tommorow, as I am quite confident when the techs test it, they will experience the same problem as me...
I will post back in this thread as soon as I find out what happens when I return my CPU...